CN109283123A - Soil accelerated corrosion tests device and experimental method - Google Patents
Soil accelerated corrosion tests device and experimental method Download PDFInfo
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- CN109283123A CN109283123A CN201811254094.XA CN201811254094A CN109283123A CN 109283123 A CN109283123 A CN 109283123A CN 201811254094 A CN201811254094 A CN 201811254094A CN 109283123 A CN109283123 A CN 109283123A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/002—Test chambers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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Abstract
The present invention provides a kind of soil accelerated corrosion tests device and experimental methods, the experimental provision includes air supply system, experimental system and spray fluid infusion system, experimental system includes experimental box body, air-breather and seal cover board, air-breather is made of the hollow shelf connection that multiple side walls are provided with through-hole, for storing experiment soil and test piece between adjacent hollow shelf, the bottom of air-breather is equipped with air inlet, air supply system includes oxygen cylinder, nitrogen cylinder and gas flow control device, gas flow control device is used to control the ratio of the oxygen of oxygen cylinder conveying and the nitrogen of nitrogen cylinder conveying, to adjust the concentration of oxygen, oxygen after concentration is adjusted is entered in experimental box body by air inlet, fluid infusion system is sprayed to be used to carry out fluid infusion to experiment soil, to adjust the moisture content of experiment soil.The problem of present invention is able to solve prior art soil corrosion research and is restricted, and the corrosion product of different sample will cause soil pollution, influence experimental situation.
Description
Technical field
The present invention relates to soil corrosivity the field of test technology, more particularly to a kind of soil accelerated corrosion tests device and
Experimental method.
Background technique
The corrosion of metal in the soil is one of serious etching problem of metal.The various metal components of underground are embedded in,
Such as underground communication equipment, grounding net of transformer substation equipment and various foggaras, gas pipe, On The Oil And Gas Transportation pipe are all constantly
The problems such as suffering from soil corrosion, causing oil, gas and water to leak, or even cause floods, environmental pollution, brings huge to society
Huge economic loss.Thus, the soil corrosion process and its control problem of research material have important practical significance.
Conventional soil corrosion method mainly has outdoor scene to bury piece experimental method and laboratory simulation accelerated process two greatly at present
Class.Representative soil corrosion data are obtained under field conditions (factors) for conventional, the abrasion cycle of test piece in soil is logical
Often all in 5~10 years.The number that the long-time method of inspection determines that test piece is examined in this way is limited, it is difficult to ensure that the inspection of experiment
The reliability for surveying result and corrosion data is all very worthless for the corrosion resistance for checking and accepting product, evaluation material.In reality
Progress artificial acceleration corrosion experiment in the soil environment of room is tested, the time obtained a result can be shortened, but published soil at present
Accelerated corrosion tests device is only capable of that the temperature and humidity of experiment soil is adjusted, limits the research of soil corrosion；And mesh
When preceding soil corrosion experimental provision carries out the soil accelerated corrosion tests of a variety of earthing materials simultaneously in same experimental box, no
Corrosion product with sample will cause soil pollution, it is difficult to guarantee the unification of experimental situation.
Summary of the invention
In view of the above situation, the purpose of the present invention is to provide a kind of soil accelerated corrosion tests device and experimental method,
It is restricted with solving prior art soil corrosion research, and the corrosion product of different samples will cause soil pollution, influence
The problem of experimental situation.
A kind of soil accelerated corrosion tests device, including air supply system, experimental system and spray fluid infusion system, the experiment
System includes experimental box body, the air-breather set on the experimental box body bottom and the sealing at the top of the experimental box body
Cover board, the air-breather is made of the hollow shelf connection that multiple side walls are provided with through-hole, between the adjacent hollow shelf
For storing experiment soil and test piece, the bottom of the air-breather is equipped with air inlet, and the air supply system is used for described
Experimental box body provides the adjustable oxygen of concentration, and the spray fluid infusion system is used to carry out fluid infusion to the experiment soil, to adjust
Save the moisture content of the experiment soil.
The experimental method of above-mentioned soil accelerated corrosion tests device, comprising:
Measure the initial weight of the test piece；
The experiment soil is put between the adjacent hollow shelf, and the experiment soil is inserted into the test piece
In, make the experiment soil that the test piece be completely covered, cover the seal cover board, by the air supply system to the experiment
The adjustable oxygen of cabinet transportation concentration, and soil accelerated corrosion tests are carried out according to preset condition；
After completing soil accelerated corrosion tests, the test piece is taken out.
Compared with prior art, soil accelerated corrosion tests device provided by the invention and experimental method at least have and following have
Beneficial effect:
1) nitrogen of experimental box body and the ratio of oxygen, adjustable experiment are entered by gas flow control device control
Oxygen concentration in soil achievees the purpose that accelerate soil corrosion process, and passing through the experimental provision can be to different oxygen concentrations
Under a variety of earthing materials soil corrosion research, be conducive to the research of soil corrosion；
2) air-breather is made of the connection of multiple ventilation partitions, is uniformly provided with ventilation through-hole, Neng Goubao on partition of ventilating
The gas that is passed through is demonstrate,proved to be uniformly distributed in the soil, be conducive to maintain test piece surrounding soil temperature, oxygen concentration it is constant；
3) experimental box body is divided into multiple independent corrosion areas by ventilation partition, and different zones can carry out a variety of simultaneously
It is rotten to avoid galvanic couple between corrosion product phase counterdiffusion in the soil and different materials for the soil accelerated corrosion tests of earthing material
Erosion acts on the influence to soil corrosion process.
In addition, soil accelerated corrosion tests device provided by the invention also has following technical characteristic:
Further, the air supply system includes oxygen cylinder, nitrogen cylinder and gas control equipment, the gas flow control
Device is used to control the ratio of the oxygen of the oxygen cylinder conveying and the nitrogen of nitrogen cylinder conveying, to adjust the dense of oxygen
Degree, the oxygen after concentration is adjusted are entered in the experimental box body by the air inlet.
Further, the air supply system further includes three-way pipeline and appendix, and one end of the appendix passes through described
Three-way pipeline is connect with the oxygen cylinder and the nitrogen cylinder respectively, and the other end of the appendix is connect with the air inlet,
The gas flow control device includes set on the gas flow valve and rotor stream between the oxygen cylinder and the three-way pipeline
Meter and gas flow valve and spinner flowmeter between the nitrogen cylinder and the three-way pipeline.
Further, the air supply system further includes heating furnace, the heating furnace be connected to the three-way pipeline with it is described
Between appendix, the nitrogen that the oxygen and the nitrogen cylinder that the oxygen cylinder provides provide leads to after three-way pipeline mixing
It crosses the heating furnace to be heated, the mixed gas after heating enters the air inlet by the appendix.
Further, the experimental box body further includes Temperature Humidity Sensor and electronic probe, the Temperature Humidity Sensor and
The electronic probe is electrically connected, and the electronic probe is inserted into the experiment soil, and the Temperature Humidity Sensor is used for institute
The temperature and humidity for stating experiment soil carries out real-time monitoring.
Further, isolation gauze is installed in the through-hole of the hollow shelf.
Further, the spray fluid infusion system includes spray equipment, suction pump and liquid reserve tank, and the spray equipment is fixed
On the seal cover board, the suction pump is connect with the spray equipment and the liquid reserve tank respectively, and the liquid reserve tank is used for
Store distilled water or saline solution.
In addition, the experimental method of soil accelerated corrosion tests device provided by the invention also has following technical characteristic:
Further, before the step of measuring the initial weight of the test piece, the experimental method further include:
It is polished using test piece described in sand paper, distilled water flushing is first used in the test piece after polishing, then clear with dehydrated alcohol
It is dried after washing.
Further, the step of experiment soil being put between the adjacent hollow shelf specifically includes:
Described test in the baking oven that soil is placed in is dried, is sieved after grinding, then uniformly by the reality after sieving
Soil-burial is tested between the adjacent hollow shelf, AD Experiment is molten into experiment soil by the spray fluid infusion system
Liquid, so that the moisture content of experiment soil reaches preset value, then experiment soil is stand-by after mixing evenly.
Further, the test piece is inserted into the step in the experiment soil, makes the experiment of the test piece all directions
Thickness >=50mm of soil.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of the soil accelerated corrosion tests device of one embodiment of the invention；
Fig. 2 is the side structure schematic view of air-breather in Fig. 1；
Fig. 3 is the operation principle schematic diagram of air-breather in Fig. 1.
Specific embodiment
To keep objects, features and advantages of the present invention more obvious and easy to understand, with reference to the accompanying drawing to tool of the invention
Body embodiment is described in detail.Several embodiments of the invention are given in attached drawing.But the present invention can be with many not
With form realize, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes to this
The disclosure of invention is more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
One embodiment of the invention provides a kind of soil accelerated corrosion tests device, including air supply system, experimental system and
Spray fluid infusion system.
It please refers to Fig.1 to Fig.3, the experimental system includes experimental box body 11, set on the logical of 11 bottom of experimental box body
Device of air 12 and the seal cover board 13 at the top of the experimental box body 11, the air-breather 12 is provided with logical by multiple side walls
The hollow shelf 121 in hole, which is connected to, to be constituted, for storing experiment soil 40 and test piece between the adjacent hollow shelf 121
50, the bottom of the air-breather 12 is equipped with air inlet 14.Specifically, the top of the experimental box body 11 is equipped with gas outlet 15.
Optionally, it is equipped with insulating layer outside the experimental box body 11, heat insulation effect is provided.It can be in the through-hole of the hollow shelf 121
Isolation gauze 18 is installed, to prevent experiment soil 40 from entering air-breather 12, can guarantee to be passed through gas uniform in the soil
Distribution, be conducive to maintain test piece surrounding soil temperature, oxygen concentration it is constant.Through-hole it is conveniently of circular shape, gas can be from
Soil 40 is tested in the inflow of uniform and delicate in the circular through hole of 12 side wall of air-breather, guarantees the perseverance of the soil moisture and oxygen concentration
It is fixed.
The air supply system is used to provide the adjustable oxygen of concentration to the experimental box body 11.
As an alternative embodiment, the air supply system includes oxygen cylinder 21, nitrogen cylinder 22, gas flow control
Device, three-way pipeline 23 and appendix 24, the gas flow control device are used to control the oxygen that the oxygen cylinder 21 conveys
And the ratio of nitrogen that the nitrogen cylinder 22 conveys, to adjust the concentration of oxygen, concentration adjust after oxygen by it is described into
Port 14 enters in the experimental box body 11.
One end of the appendix 24 by the three-way pipeline 23 respectively with the oxygen cylinder 21 and the nitrogen cylinder 22
Connection, the other end of the appendix 24 are connect with the air inlet 14.
The gas flow control device specifically includes the gas between the oxygen cylinder 21 and the three-way pipeline 23
Body flow valve 25 and spinner flowmeter 26 and the gas flow valve between the nitrogen cylinder 22 and the three-way pipeline 23
27 and spinner flowmeter 28.
The air supply system can also include heating furnace 29, the heating furnace 29 be connected to the three-way pipeline 23 with it is described
Between appendix 24, the nitrogen that the oxygen and the nitrogen cylinder 22 that the oxygen cylinder 21 provides provide is mixed in the three-way pipeline 23
It after conjunction, is heated by the heating furnace 29, the mixed gas after heating enters the air inlet by the appendix 24
14.Preferably, heating furnace 29 can use tubular heater, and wrap up in one layer of collet in the outside of heating furnace 29, guarantee heating
Effect.
The spray fluid infusion system is used to carry out fluid infusion to the experiment soil 40, to adjust containing for the experiment soil 40
Water rate.
Specifically, the spray fluid infusion system includes spray equipment 31, suction pump 32 and liquid reserve tank 33, the spray equipment
31 are fixed on the seal cover board 13, and the suction pump 32 is connect with the spray equipment 31 and the liquid reserve tank 33 respectively,
The liquid reserve tank 33 is for storing distilled water or saline solution, to simulate actual rainfall.
In the present embodiment, the experimental box body further includes Temperature Humidity Sensor 16 and electronic probe 17, and the temperature and humidity passes
Sensor 16 and the electronic probe 17 are electrically connected, and the electronic probe 17 is inserted into the experiment soil 40, the temperature and humidity
Sensor 16 is used to carry out real-time monitoring to the temperature and humidity of the experiment soil 40.
Another embodiment of the present invention additionally provides the experimental method of above-mentioned soil accelerated corrosion tests device, includes at least
Step 1~3:
Step 1, the initial weight of the test piece is measured；
Wherein, before the step of measuring the initial weight of the test piece, the experimental method can also include:
The processing of test piece: being polished using test piece described in sand paper, and distilled water flushing is first used in the test piece after polishing, is then used
It dries, can be put into after drying spare in drier after washes of absolute alcohol.Specifically, the size of soil corrosion test piece is
50mm × 25mm × 3mm, test piece are polished before carrying out soil accelerated corrosion tests with 280# sand paper, and the test piece after polishing is first
It is put into spare in drier with distilled water flushing then with being dried after washes of absolute alcohol.Particularly, for galvanized steel, copper-clad
There is steel etc. the test piece of metal coating need to carry out edge sealing to test piece surrounding with epoxy resin, epoxy resin with a thickness of 2~5mm,
Experimental result is had an impact to avoid galvanic corrosion caused by exposure substrate.Test piece records its original quality before placing into the soil,
The material parallel sample of every group of experiment is 3,
Step 2, the experiment soil is put between the adjacent hollow shelf, and the reality is inserted into the test piece
It tests in soil, makes the experiment soil that the test piece be completely covered, cover the seal cover board, by the air supply system to institute
The adjustable oxygen of experimental box body transportation concentration is stated, and carries out soil accelerated corrosion tests according to preset condition；
Wherein, the step of experiment soil being put between the adjacent hollow shelf specifically includes:
The processing of soil: described test in the baking oven that soil is placed in is dried, is sieved after grinding, then uniformly will
Experiment soil-burial after sieving is between the adjacent hollow shelf, through the spray fluid infusion system into experiment soil
AD Experiment solution, so that the moisture content of experiment soil reaches preset value, then experiment soil is stand-by after mixing evenly.Specifically
, the soil of experiment dries 6h in 110 DEG C of baking oven using preposition, crosses 20 meshes (0.5-1mm) after grinding, then
Uniformly will experiment soil-burial to the position of experimental box body about 1/2, by liquid supply device, into soil, AD Experiment solution is extremely
Provide moisture content, soil is stand-by after mixing evenly.
Soil is tested in experimentation must completely cover test piece, and at least 50mm under soil, sample all directions soil
Thickness should all >=50mm, to guarantee to have enough soil medias that corrosion is maintained to carry out.After having buried test piece, experimental box body is covered tightly
Seal cover board.Preferably, when having multiple test pieces while being tested, test piece is embedded in parallel in experiment soil, and all examinations
Piece is embedded in the height in soil and need to be consistent.
After determining the parameters such as temperature, moisture content, the oxygen concentration of experiment soil.By controlling gas flow valve for nitrogen
It is mixed in proportion with oxygen, mixed gas is passed through the ventilation dress positioned at experimental box body bottom after being heated by heating furnace
It sets, the soil moisture and oxygen concentration is adjusted.When moisture evaporation causes soil moisture content to reduce, spray equipment pair can be passed through
Soil carries out fluid infusion, maintains the constant of soil moisture content.
Step 3, after completing soil accelerated corrosion tests, the test piece is taken out.
Wherein, after the abrasion cycle as defined in completing, test piece is taken out, specifically institute can be calculated by the corrosion weight loss of test piece
State the corrosion rate of experiment soil.Further, it can also be carried out using corrosion product of the analytical technologies such as SEM, XRD to sample
Comprehensive analysis removes the corrosion product of strip, according still further to GB/T16545 with being averaged on 3 parallel test piece unit areas
Weightlessness calculates corrosion rate, to make more accurate evaluation to the corrosion resistance of earthing material in the soil.
According to soil accelerated corrosion tests device provided in this embodiment and experimental method, pass through gas flow control device
Control enters the nitrogen of experimental box body and the ratio of oxygen, and the oxygen concentration in adjustable experiment soil reaches and accelerates soil rotten
The purpose of erosion process, and can grinding to the soil corrosion of earthing materials a variety of under different oxygen concentrations by the experimental provision
Study carefully, is conducive to the research of soil corrosion；Wherein, air-breather is made of the connection of multiple ventilation partitions, uniform on partition of ventilating
It is provided with ventilation through-hole, can guarantee that the gas being passed through is uniformly distributed in the soil, is conducive to maintain test piece surrounding soil temperature, oxygen
Concentration it is constant；Experimental box body is divided into multiple independent corrosion areas by ventilation partition, and different zones can carry out more simultaneously
The soil accelerated corrosion tests of kind of earthing material avoid galvanic couple between corrosion product phase counterdiffusion in the soil and different materials
Influence of the corrosiveness to soil corrosion process.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of soil accelerated corrosion tests device, which is characterized in that including air supply system, experimental system and spray fluid infusion system
System, the experimental system include experimental box body, set on the air-breather of the experimental box body bottom and set on the experimental box
Seal cover board at the top of body, the air-breather are made of the hollow shelf connection that multiple side walls are provided with through-hole, and adjacent is described
For storing experiment soil and test piece between hollow shelf, the bottom of the air-breather is equipped with air inlet, the gas supply system
System for the experimental box body provide the adjustable oxygen of concentration, the spray fluid infusion system for the experiment soil into
Row fluid infusion, to adjust the moisture content of the experiment soil.
2. soil accelerated corrosion tests device according to claim 1, which is characterized in that the air supply system includes oxygen
Bottle, nitrogen cylinder and gas control equipment, the gas flow control device be used to control the oxygen cylinder conveying oxygen and
The ratio of the nitrogen of nitrogen cylinder conveying, to adjust the concentration of oxygen, concentration adjust after oxygen by the air inlet into
Enter in the experimental box body.
3. soil accelerated corrosion tests device according to claim 2, which is characterized in that the air supply system further includes three
It threads a pipe and appendix, one end of the appendix is connected with the oxygen cylinder and the nitrogen cylinder respectively by the three-way pipeline
It connects, the other end of the appendix is connect with the air inlet, and the gas flow control device includes being set to the oxygen cylinder
Gas flow valve and spinner flowmeter between the three-way pipeline and be set to the nitrogen cylinder and the three-way pipeline it
Between gas flow valve and spinner flowmeter.
4. soil accelerated corrosion tests device according to claim 3, which is characterized in that the air supply system further includes adding
Hot stove, the heating furnace are connected between the three-way pipeline and the appendix, oxygen that the oxygen cylinder provides and described
The nitrogen that nitrogen cylinder provides is heated, the mixed gas after heating after three-way pipeline mixing by the heating furnace
Enter the air inlet by the appendix.
5. soil accelerated corrosion tests device according to claim 1, which is characterized in that the experimental box body further includes temperature
Humidity sensor and electronic probe, the Temperature Humidity Sensor and the electronic probe are electrically connected, the electronic probe insertion
In the experiment soil, the Temperature Humidity Sensor is used to carry out real-time monitoring to the temperature and humidity of the experiment soil.
6. soil accelerated corrosion tests device according to claim 1, which is characterized in that the spray fluid infusion system includes
Spray equipment, suction pump and liquid reserve tank, the spray equipment are fixed on the seal cover board, the suction pump respectively with it is described
Spray equipment is connected with the liquid reserve tank, and the liquid reserve tank is for storing distilled water or saline solution.
7. the experimental method of soil accelerated corrosion tests device described in claim 1 characterized by comprising
Measure the initial weight of the test piece；
The experiment soil is put between the adjacent hollow shelf, and the test piece is inserted into the experiment soil,
Make the experiment soil that the test piece be completely covered, cover the seal cover board, by the air supply system to the experimental box
The adjustable oxygen of body transportation concentration, and soil accelerated corrosion tests are carried out according to preset condition；
After completing soil accelerated corrosion tests, the test piece is taken out.
8. experimental method according to claim 7, which is characterized in that the step of measuring the initial weight of the test piece it
Before, the experimental method further include:
It is polished using test piece described in sand paper, distilled water flushing is first used in the test piece after polishing, then with after washes of absolute alcohol
Drying.
9. experimental method according to claim 7, which is characterized in that be put into the experiment soil adjacent described hollow
The step of between partition, specifically includes:
Described test in the baking oven that soil is placed in is dried, is sieved after grinding, then uniformly by the experiment soil after sieving
Earth is filled between the adjacent hollow shelf, by the spray fluid infusion system into experiment soil AD Experiment solution,
So that the moisture content of experiment soil reaches preset value, then experiment soil is stand-by after mixing evenly.
10. experimental method according to claim 7, which is characterized in that the test piece to be inserted into the experiment soil
In step, make thickness >=50mm of the experiment soil of the test piece all directions.
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| CN113075355A (en) * | 2020-01-03 | 2021-07-06 | 中国石油化工股份有限公司 | Multifunctional corrosion inhibitor testing device and testing method thereof |
| CN114047115A (en) * | 2021-11-15 | 2022-02-15 | 刘侠 | Corrosion-resistant soil detection system |
| WO2023223413A1 (en) * | 2022-05-17 | 2023-11-23 | 日本電信電話株式会社 | Corrosion estimation device and method |
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| CN109283123B (en) | 2021-03-02 |
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